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<pre class="code"><code><span id="1" class="l"><span class="xlang">&lt;?php</span>
</span><span id="2" class="l"><span class="php-keyword1">namespace</span> LeanCloud\Operation;
</span><span id="3" class="l">
</span><span id="4" class="l"><span class="php-keyword1">use</span> LeanCloud\Client;
</span><span id="5" class="l"><span class="php-keyword1">use</span> LeanCloud\Operation\SetOperation;
</span><span id="6" class="l"><span class="php-keyword1">use</span> LeanCloud\Operation\DeleteOperation;
</span><span id="7" class="l">
</span><span id="8" class="l"><span class="php-comment">/**
</span></span><span id="9" class="l"><span class="php-comment"> * Array opertion - Add, Remove, AddUnique
</span></span><span id="10" class="l"><span class="php-comment"> *
</span></span><span id="11" class="l"><span class="php-comment"> */</span>
</span><span id="12" class="l"><span class="php-keyword1">class</span> ArrayOperation <span class="php-keyword1">implements</span> IOperation {
</span><span id="13" class="l">    <span class="php-comment">/**
</span></span><span id="14" class="l"><span class="php-comment">     * The key of field the operation is about to apply
</span></span><span id="15" class="l"><span class="php-comment">     *
</span></span><span id="16" class="l"><span class="php-comment">     * @var string
</span></span><span id="17" class="l"><span class="php-comment">     */</span>
</span><span id="18" class="l">    <span class="php-keyword1">private</span> <span class="php-var">$key</span>;
</span><span id="19" class="l">
</span><span id="20" class="l">    <span class="php-comment">/**
</span></span><span id="21" class="l"><span class="php-comment">     * The value of operation
</span></span><span id="22" class="l"><span class="php-comment">     * @var mixed
</span></span><span id="23" class="l"><span class="php-comment">     */</span>
</span><span id="24" class="l">    <span class="php-keyword1">private</span> <span class="php-var">$value</span>;
</span><span id="25" class="l">
</span><span id="26" class="l">    <span class="php-comment">/**
</span></span><span id="27" class="l"><span class="php-comment">     * The operation type
</span></span><span id="28" class="l"><span class="php-comment">     *
</span></span><span id="29" class="l"><span class="php-comment">     * @var string
</span></span><span id="30" class="l"><span class="php-comment">     */</span>
</span><span id="31" class="l">    <span class="php-keyword1">private</span> <span class="php-var">$opType</span>;
</span><span id="32" class="l">
</span><span id="33" class="l">    <span class="php-comment">/**
</span></span><span id="34" class="l"><span class="php-comment">     * Initialize an ArrayOperation
</span></span><span id="35" class="l"><span class="php-comment">     *
</span></span><span id="36" class="l"><span class="php-comment">     * @param string $key     Field key
</span></span><span id="37" class="l"><span class="php-comment">     * @param array  $val     Array of values to add or remove
</span></span><span id="38" class="l"><span class="php-comment">     * @param string $opType  One of Add, AddUnique, Remove
</span></span><span id="39" class="l"><span class="php-comment">     * @throws RuntimeException, InvalidArgumentException
</span></span><span id="40" class="l"><span class="php-comment">     */</span>
</span><span id="41" class="l">    <span class="php-keyword1">public</span> <span class="php-keyword1">function</span> __construct(<span class="php-var">$key</span>, <span class="php-var">$val</span>, <span class="php-var">$opType</span>) {
</span><span id="42" class="l">        <span class="php-keyword1">if</span> (!<span class="php-keyword2">in_array</span>(<span class="php-var">$opType</span>, <span class="php-keyword1">array</span>(<span class="php-quote">&quot;Add&quot;</span>, <span class="php-quote">&quot;AddUnique&quot;</span>, <span class="php-quote">&quot;Remove&quot;</span>))) {
</span><span id="43" class="l">            <span class="php-keyword1">throw</span> <span class="php-keyword1">new</span> \InvalidArgumentException(<span class="php-quote">&quot;Operation on array not &quot;</span> .
</span><span id="44" class="l">                                                <span class="php-quote">&quot;supported: </span><span class="php-var">{$opType}</span><span class="php-quote">.&quot;</span>);
</span><span id="45" class="l">        }
</span><span id="46" class="l">        <span class="php-keyword1">if</span> (!<span class="php-keyword2">is_array</span>(<span class="php-var">$val</span>)) {
</span><span id="47" class="l">            <span class="php-keyword1">throw</span> <span class="php-keyword1">new</span> \InvalidArgumentException(<span class="php-quote">&quot;Operand must be array.&quot;</span>);
</span><span id="48" class="l">        }
</span><span id="49" class="l">        <span class="php-var">$this</span>-&gt;<span class="php-keyword2">key</span>    = <span class="php-var">$key</span>;
</span><span id="50" class="l">        <span class="php-var">$this</span>-&gt;value  = <span class="php-var">$val</span>;
</span><span id="51" class="l">        <span class="php-var">$this</span>-&gt;opType = <span class="php-var">$opType</span>;
</span><span id="52" class="l">    }
</span><span id="53" class="l">
</span><span id="54" class="l">    <span class="php-comment">/**
</span></span><span id="55" class="l"><span class="php-comment">     * Get key of field the operation applies to.
</span></span><span id="56" class="l"><span class="php-comment">     *
</span></span><span id="57" class="l"><span class="php-comment">     * @return string
</span></span><span id="58" class="l"><span class="php-comment">     */</span>
</span><span id="59" class="l">    <span class="php-keyword1">public</span> <span class="php-keyword1">function</span> getKey() {
</span><span id="60" class="l">        <span class="php-keyword1">return</span> <span class="php-var">$this</span>-&gt;<span class="php-keyword2">key</span>;
</span><span id="61" class="l">    }
</span><span id="62" class="l">
</span><span id="63" class="l">    <span class="php-comment">/**
</span></span><span id="64" class="l"><span class="php-comment">     * Get type of operation
</span></span><span id="65" class="l"><span class="php-comment">     *
</span></span><span id="66" class="l"><span class="php-comment">     * @return string
</span></span><span id="67" class="l"><span class="php-comment">     */</span>
</span><span id="68" class="l">    <span class="php-keyword1">public</span> <span class="php-keyword1">function</span> getOpType() {
</span><span id="69" class="l">        <span class="php-keyword1">return</span> <span class="php-var">$this</span>-&gt;opType;
</span><span id="70" class="l">    }
</span><span id="71" class="l">
</span><span id="72" class="l">    <span class="php-comment">/**
</span></span><span id="73" class="l"><span class="php-comment">     * Get value of operation
</span></span><span id="74" class="l"><span class="php-comment">     *
</span></span><span id="75" class="l"><span class="php-comment">     * @return mixed
</span></span><span id="76" class="l"><span class="php-comment">     */</span>
</span><span id="77" class="l">    <span class="php-keyword1">public</span> <span class="php-keyword1">function</span> getValue() {
</span><span id="78" class="l">        <span class="php-keyword1">return</span> <span class="php-var">$this</span>-&gt;value;
</span><span id="79" class="l">    }
</span><span id="80" class="l">
</span><span id="81" class="l">    <span class="php-comment">/**
</span></span><span id="82" class="l"><span class="php-comment">     * Encode to JSON represented operation
</span></span><span id="83" class="l"><span class="php-comment">     *
</span></span><span id="84" class="l"><span class="php-comment">     * @return array
</span></span><span id="85" class="l"><span class="php-comment">     */</span>
</span><span id="86" class="l">    <span class="php-keyword1">public</span> <span class="php-keyword1">function</span> encode() {
</span><span id="87" class="l">        <span class="php-keyword1">return</span> <span class="php-keyword1">array</span>(
</span><span id="88" class="l">            <span class="php-quote">&quot;__op&quot;</span>    =&gt; <span class="php-var">$this</span>-&gt;getOpType(),
</span><span id="89" class="l">            <span class="php-quote">&quot;objects&quot;</span> =&gt; Client::encode(<span class="php-var">$this</span>-&gt;value),
</span><span id="90" class="l">        );
</span><span id="91" class="l">    }
</span><span id="92" class="l">
</span><span id="93" class="l">    <span class="php-comment">/**
</span></span><span id="94" class="l"><span class="php-comment">     * Add objects of this operation to old array
</span></span><span id="95" class="l"><span class="php-comment">     *
</span></span><span id="96" class="l"><span class="php-comment">     * @param  array $oldval Old array of objects
</span></span><span id="97" class="l"><span class="php-comment">     * @return array         Merged new array
</span></span><span id="98" class="l"><span class="php-comment">     */</span>
</span><span id="99" class="l">    <span class="php-keyword1">private</span> <span class="php-keyword1">function</span> add(<span class="php-var">$oldval</span>) {
</span><span id="100" class="l">        <span class="php-keyword1">return</span> <span class="php-keyword2">array_merge</span>(<span class="php-var">$oldval</span>, <span class="php-var">$this</span>-&gt;getValue());
</span><span id="101" class="l">    }
</span><span id="102" class="l">
</span><span id="103" class="l">    <span class="php-comment">/**
</span></span><span id="104" class="l"><span class="php-comment">     * Add objects of this operation, uniquely, to old array.
</span></span><span id="105" class="l"><span class="php-comment">     *
</span></span><span id="106" class="l"><span class="php-comment">     * Note duplicated items in old array will remain duplicate.
</span></span><span id="107" class="l"><span class="php-comment">     *
</span></span><span id="108" class="l"><span class="php-comment">     * @param  array $oldval Old array of objects
</span></span><span id="109" class="l"><span class="php-comment">     * @return array
</span></span><span id="110" class="l"><span class="php-comment">     */</span>
</span><span id="111" class="l">    <span class="php-keyword1">private</span> <span class="php-keyword1">function</span> addUnique(<span class="php-var">$oldval</span>) {
</span><span id="112" class="l">        <span class="php-var">$newval</span> = <span class="php-var">$oldval</span>; <span class="php-comment">// New result array</span>
</span><span id="113" class="l">        <span class="php-var">$found</span>  = <span class="php-keyword1">array</span>(); <span class="php-comment">// Hash map of objects with objectId as key</span>
</span><span id="114" class="l">        <span class="php-keyword1">forEach</span>(<span class="php-var">$oldval</span> <span class="php-keyword1">as</span> <span class="php-var">$obj</span>) {
</span><span id="115" class="l">            <span class="php-keyword1">if</span> ((<span class="php-var">$obj</span> <span class="php-keyword1">instanceof</span> Object) &amp;&amp; (<span class="php-var">$obj</span>-&gt;getObjectId())) {
</span><span id="116" class="l">                <span class="php-var">$found</span>[<span class="php-var">$obj</span>-&gt;getObjectId()] = <span class="php-keyword1">true</span>;
</span><span id="117" class="l">            }
</span><span id="118" class="l">        }
</span><span id="119" class="l">        <span class="php-keyword1">forEach</span>(<span class="php-var">$this</span>-&gt;getValue() <span class="php-keyword1">as</span> <span class="php-var">$obj</span>) {
</span><span id="120" class="l">            <span class="php-keyword1">if</span> ((<span class="php-var">$obj</span> <span class="php-keyword1">instanceof</span> Object) &amp;&amp; (<span class="php-var">$obj</span>-&gt;getObjectId())) {
</span><span id="121" class="l">                <span class="php-keyword1">if</span> (<span class="php-keyword1">isset</span>(<span class="php-var">$found</span>[<span class="php-var">$obj</span>-&gt;getObjectId()])) {
</span><span id="122" class="l">                    <span class="php-comment">// skip duplicate object</span>
</span><span id="123" class="l">                } <span class="php-keyword1">else</span> {
</span><span id="124" class="l">                    <span class="php-var">$found</span>[<span class="php-var">$obj</span>-&gt;getObjectId()] = <span class="php-keyword1">true</span>;
</span><span id="125" class="l">                    <span class="php-var">$newval</span>[]                   = <span class="php-var">$obj</span>;
</span><span id="126" class="l">                }
</span><span id="127" class="l">            } <span class="php-keyword1">else</span> <span class="php-keyword1">if</span> (!<span class="php-keyword2">in_array</span>(<span class="php-var">$obj</span>, <span class="php-var">$newval</span>)) {
</span><span id="128" class="l">                <span class="php-var">$newval</span>[] = <span class="php-var">$obj</span>;
</span><span id="129" class="l">            }
</span><span id="130" class="l">        }
</span><span id="131" class="l">        <span class="php-keyword1">return</span> <span class="php-var">$newval</span>;
</span><span id="132" class="l">    }
</span><span id="133" class="l">
</span><span id="134" class="l">    <span class="php-comment">/**
</span></span><span id="135" class="l"><span class="php-comment">     * Remove objects of this operation from old array.
</span></span><span id="136" class="l"><span class="php-comment">     *
</span></span><span id="137" class="l"><span class="php-comment">     * @param  array $oldval Old array of objects
</span></span><span id="138" class="l"><span class="php-comment">     * @return array
</span></span><span id="139" class="l"><span class="php-comment">     */</span>
</span><span id="140" class="l">    <span class="php-keyword1">private</span> <span class="php-keyword1">function</span> remove(<span class="php-var">$oldval</span>) {
</span><span id="141" class="l">        <span class="php-var">$newval</span> = <span class="php-keyword1">array</span>();
</span><span id="142" class="l">        <span class="php-var">$remove</span> = <span class="php-var">$this</span>-&gt;getValue(); <span class="php-comment">// items to remove</span>
</span><span id="143" class="l">        <span class="php-keyword1">forEach</span>(<span class="php-var">$oldval</span> <span class="php-keyword1">as</span> <span class="php-var">$item</span>) {
</span><span id="144" class="l">            <span class="php-keyword1">if</span> (!<span class="php-keyword2">in_array</span>(<span class="php-var">$item</span>, <span class="php-var">$remove</span>)) {
</span><span id="145" class="l">                <span class="php-var">$newval</span>[] = <span class="php-var">$item</span>;
</span><span id="146" class="l">            }
</span><span id="147" class="l">        }
</span><span id="148" class="l">        <span class="php-keyword1">return</span> <span class="php-var">$newval</span>;
</span><span id="149" class="l">    }
</span><span id="150" class="l">
</span><span id="151" class="l">    <span class="php-comment">/**
</span></span><span id="152" class="l"><span class="php-comment">     * Apply this operation based on old array.
</span></span><span id="153" class="l"><span class="php-comment">     *
</span></span><span id="154" class="l"><span class="php-comment">     * @param  array $oldval Old array
</span></span><span id="155" class="l"><span class="php-comment">     * @return array
</span></span><span id="156" class="l"><span class="php-comment">     * @throws RuntimeException
</span></span><span id="157" class="l"><span class="php-comment">     */</span>
</span><span id="158" class="l">    <span class="php-keyword1">public</span> <span class="php-keyword1">function</span> applyOn(<span class="php-var">$oldval</span>) {
</span><span id="159" class="l">        <span class="php-keyword1">if</span> (!<span class="php-var">$oldval</span>) { <span class="php-var">$oldval</span> = <span class="php-keyword1">array</span>();}
</span><span id="160" class="l">
</span><span id="161" class="l">        <span class="php-keyword1">if</span> (!<span class="php-keyword2">is_array</span>(<span class="php-var">$oldval</span>)) {
</span><span id="162" class="l">            <span class="php-keyword1">throw</span> <span class="php-keyword1">new</span> \RuntimeException(<span class="php-quote">&quot;Operation incompatible&quot;</span> .
</span><span id="163" class="l">                                        <span class="php-quote">&quot; with previous value.&quot;</span>);
</span><span id="164" class="l">        }
</span><span id="165" class="l">
</span><span id="166" class="l">        <span class="php-comment">// TODO: Ensure behaviours of adding and removing associative array</span>
</span><span id="167" class="l">        <span class="php-keyword1">if</span> (<span class="php-var">$this</span>-&gt;getOpType() === <span class="php-quote">&quot;Add&quot;</span>) {
</span><span id="168" class="l">            <span class="php-keyword1">return</span> <span class="php-var">$this</span>-&gt;add(<span class="php-var">$oldval</span>);
</span><span id="169" class="l">        }
</span><span id="170" class="l">        <span class="php-keyword1">if</span> (<span class="php-var">$this</span>-&gt;getOpType() === <span class="php-quote">&quot;AddUnique&quot;</span>) {
</span><span id="171" class="l">            <span class="php-keyword1">return</span> <span class="php-var">$this</span>-&gt;addUnique(<span class="php-var">$oldval</span>);
</span><span id="172" class="l">        }
</span><span id="173" class="l">        <span class="php-keyword1">if</span> (<span class="php-var">$this</span>-&gt;getOpType() === <span class="php-quote">&quot;Remove&quot;</span>) {
</span><span id="174" class="l">            <span class="php-keyword1">return</span> <span class="php-var">$this</span>-&gt;remove(<span class="php-var">$oldval</span>);
</span><span id="175" class="l">        }
</span><span id="176" class="l">        <span class="php-keyword1">throw</span> <span class="php-keyword1">new</span> \RuntimeException(<span class="php-quote">&quot;Operation type </span><span class="php-var">{$this-&gt;getOptype()}</span><span class="php-quote">&quot;</span> .
</span><span id="177" class="l">                                    <span class="php-quote">&quot; not supported.&quot;</span>);
</span><span id="178" class="l">    }
</span><span id="179" class="l">
</span><span id="180" class="l">    <span class="php-comment">/**
</span></span><span id="181" class="l"><span class="php-comment">     * Merge this operation into a (previous) operation.
</span></span><span id="182" class="l"><span class="php-comment">     *
</span></span><span id="183" class="l"><span class="php-comment">     * @param IOperation $prevOp
</span></span><span id="184" class="l"><span class="php-comment">     * @return IOperation
</span></span><span id="185" class="l"><span class="php-comment">     */</span>
</span><span id="186" class="l">    <span class="php-keyword1">public</span> <span class="php-keyword1">function</span> mergeWith(<span class="php-var">$prevOp</span>) {
</span><span id="187" class="l">        <span class="php-keyword1">if</span> (!<span class="php-var">$prevOp</span>) {
</span><span id="188" class="l">            <span class="php-keyword1">return</span> <span class="php-var">$this</span>;
</span><span id="189" class="l">        } <span class="php-keyword1">else</span> <span class="php-keyword1">if</span> (<span class="php-var">$prevOp</span> <span class="php-keyword1">instanceof</span> SetOperation) {
</span><span id="190" class="l">            <span class="php-keyword1">if</span> (!<span class="php-keyword2">is_array</span>(<span class="php-var">$prevOp</span>-&gt;getValue())) {
</span><span id="191" class="l">                <span class="php-keyword1">throw</span> <span class="php-keyword1">new</span> \RuntimeException(<span class="php-quote">&quot;Operation incompatible &quot;</span> .
</span><span id="192" class="l">                                          <span class="php-quote">&quot;with previous value.&quot;</span>);
</span><span id="193" class="l">            }
</span><span id="194" class="l">            <span class="php-keyword1">return</span> <span class="php-keyword1">new</span> SetOperation(<span class="php-var">$this</span>-&gt;<span class="php-keyword2">key</span>,
</span><span id="195" class="l">                                    <span class="php-var">$this</span>-&gt;applyOn(<span class="php-var">$prevOp</span>-&gt;getValue()));
</span><span id="196" class="l">        } <span class="php-keyword1">else</span> <span class="php-keyword1">if</span> ((<span class="php-var">$prevOp</span> <span class="php-keyword1">instanceof</span> ArrayOperation) &amp;&amp;
</span><span id="197" class="l">                   (<span class="php-var">$this</span>-&gt;getOpType() === <span class="php-var">$prevOp</span>-&gt;getOpType())) {
</span><span id="198" class="l">            <span class="php-keyword1">if</span> (<span class="php-var">$this</span>-&gt;getOpType() === <span class="php-quote">&quot;Remove&quot;</span>) {
</span><span id="199" class="l">                <span class="php-var">$objects</span> = <span class="php-keyword2">array_merge</span>(<span class="php-var">$prevOp</span>-&gt;getValue(), <span class="php-var">$this</span>-&gt;getValue());
</span><span id="200" class="l">            } <span class="php-keyword1">else</span> {
</span><span id="201" class="l">                <span class="php-var">$objects</span> = <span class="php-var">$this</span>-&gt;applyOn(<span class="php-var">$prevOp</span>-&gt;getValue());
</span><span id="202" class="l">            }
</span><span id="203" class="l">            <span class="php-keyword1">return</span> <span class="php-keyword1">new</span> ArrayOperation(<span class="php-var">$this</span>-&gt;<span class="php-keyword2">key</span>,
</span><span id="204" class="l">                                      <span class="php-var">$objects</span>,
</span><span id="205" class="l">                                      <span class="php-var">$this</span>-&gt;getOpType());
</span><span id="206" class="l">        } <span class="php-keyword1">else</span> <span class="php-keyword1">if</span> (<span class="php-var">$prevOp</span> <span class="php-keyword1">instanceof</span> DeleteOperation) {
</span><span id="207" class="l">            <span class="php-keyword1">if</span> (<span class="php-var">$this</span>-&gt;getOpType() === <span class="php-quote">&quot;Remove&quot;</span>) {
</span><span id="208" class="l">                <span class="php-keyword1">return</span> <span class="php-var">$prevOp</span>;
</span><span id="209" class="l">            } <span class="php-keyword1">else</span> {
</span><span id="210" class="l">                <span class="php-keyword1">return</span> <span class="php-keyword1">new</span> SetOperation(<span class="php-var">$this</span>-&gt;getKey(), <span class="php-var">$this</span>-&gt;applyOn(<span class="php-keyword1">null</span>));
</span><span id="211" class="l">            }
</span><span id="212" class="l">        } <span class="php-keyword1">else</span> {
</span><span id="213" class="l">            <span class="php-keyword1">throw</span> <span class="php-keyword1">new</span> \RuntimeException(<span class="php-quote">&quot;Operation incompatible with&quot;</span> .
</span><span id="214" class="l">                                        <span class="php-quote">&quot; previous one.&quot;</span>);
</span><span id="215" class="l">        }
</span><span id="216" class="l">    }
</span><span id="217" class="l">}
</span><span id="218" class="l">
</span><span id="219" class="l"></span></code></pre>

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